package com.dcy.principle.ocp;

/**
 * @Author：dcy
 * @Description:
 * @Date: 2021/1/19 8:25
 */
public class Ocp {
    public static void main(String[] args) {
        GraphicEditor graphicEditor = new GraphicEditor();
        graphicEditor.drawShape(new Rectangle());
        graphicEditor.drawShape(new Circle());
        graphicEditor.drawShape(new Triangle());
    }
}


class GraphicEditor {
    public void drawShape(Shape s) {
        if (s.m_type == 1) {
            drawRectangle(s);
        } else if (s.m_type == 2) {
            drawCircle(s);
        } else if (s.m_type == 3) {
            drawTriangle(s);
        }
    }

    public void drawRectangle(Shape r) {
        System.out.println(" 绘制矩形 ");
    }

    public void drawCircle(Shape r) {
        System.out.println(" 绘制圆形 ");
    }

    public void drawTriangle(Shape r) {
        System.out.println(" 绘制三角形 ");
    }
}

class Shape {
    int m_type;
}

class Rectangle extends Shape {
    public Rectangle() {
        super.m_type = 1;
    }
}

class Circle extends Shape {
    public Circle() {
        super.m_type = 2;
    }
}

// 新增三角形
class Triangle extends Shape {
    public Triangle() {
        super.m_type = 3;
    }
}